requires installation of Windows only Intkey software (so I haven't been able to try the keys). Site lists keys to the following:

Cotesia species of economic importance
Adeliinae Genera of the New World
Agathidinae Genera of the New World
Agathidinae Genera of Thailand
Agathirsia Species of the World
Alabagrus Species of the World
Alabagrus Species of La Selva
Aleiodes Species of the New World
Alysiinae Genera of the New World
Amputoearinus of the New World
Aphidiinae Genera of the New World
Apozyginae Genera of the New World
Betylobraconinae Genera of the New World
Blacinae Genera of the New World

A set of online interactive guides to the eastern bees. Currently there is a guide to the genera and about 20+ guides to the species of some of those genera. We hope to have all the genera up on the web by the end of 2005 and then begin working our way west to include all the bees on the continent. Guides are designed for the advanced amateur to the professional. If possible we use common names rather than jargon, but at times it is necessary to get technical to separate out closely related species. We also plan to add more pictures and illustrations (including links to Bugnet photographs

Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.